Removable cylinder spindle retaining shoulder



J1me 1965 F. J. RUSSELL ETAL 3,190,091

REMOVABLE CYLINDER SPINDLE RETAINING SHOULDER Filed May 27, 1963 27250 -.f. RUSSELL 6502s: .8. ScuoM/EFF INVENTORS Z- BY I is 3% s A-rrolzluevs Patented June 22, 1965 REMOVABLE CYLINDER SPINDLE RETAINING SHOULDER at Fred J. Russell, 8635 Otis StJ, SouthGate, 'Calif., and

George B. Solovietf, San Clemente, .Calif.; said Soloviefi assignor to said Russell i Filed May 27, 1963, Ser. No. 283,388 3 Claims. (Cl. 70-224) The invention relates to door locks and inparticular a construction. which permits removal of one key-operated mechanism or cylinder for re-keying or for replacement by another. The structure here disclosed is one which makes re-keying possible without need for additional parts or for any substantial manipulation of the lock components.

tages and attendant disadvantages. Among the more common disadvantages is the need for either wholly or partially disassembling the lock in order to gain access to the interior, whereby to extract one key-operated mechanism or cylinder in order to replace it with another. Schemes which attempt to minimize the disassembly of the lock have sundry disadvantages such, for example, as structures not sufliciently secure, mechanisms diflicult to operate, and devices which are often relatively expensive.

It is among the objects of the invention to provide a simple means for removably retaining a key-operated mechanism or cylinder assembly for a lock in the spindle of the lock.

Another object of the invention is to provide a new and improved simple means of making use of a configuration on the spindle of a lock so that it can be removably engaged by a portion of a key-operated mechanism or cylinder as a result of manipulation by a special key, thereby making it possible to easily remove the key-operated mechanism for replacement. 7

Still another object of the invention is to provide a new and improved interlock for a key-operated mechanism or cylinder assembly in a spindle by merely cutting a special configurationin the spindle wall, so as to cooperate with a movable cam in the cylinder assembly manipulated by a control key and which is incapable. of being manipulated by an operator key. 7

Still further among the objects of the invention is to provide a new and improved relatively inexpensive and simply constructed expedient-for removably attaching a cylinder assembly to position within a spindle without the need of supplying'additional material or parts or of departing from standard construction in any substantial degree. With these and other objects in view, the invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter set forth, pointed out in the appended'claims and illustrated in the accompanying drawings.

In the drawings:

FIGURE 1 is a vertical elevational view of a lock handle partially broken away to show the cylinder assembly in In an embodiment of the invention disclosed herein Many key-operated mechanism or cylinder removal expediencies exist, and these are possessed of sundry advanprimarily for the purpose of illustration, there is shown necessary portions of a lock assembly for a door comprising an operating member here taking the form of a knob 10 having a face portion'll and a shank 12. A portion only of a mounting member 13 is shown, this being the customary stationary portion of alockset which is attached to one face of a door and which customarily com prises in part a knob neck bearing or spindle bearing. The spindle 14 extends outwardly through the mounting member 13 and is rotatively retained thereby. At the inner portion of the spindle, as shown in FIGURES 1 and 4 by way of example, there is provided a detent' 15 extending through appropriate recesses (not shown) in the spindle and spring-pressed to the position shown in FIG- URE 4 by an arcuate leaf spring 16,'fo1lowing substantially conventional practice. An opening 17 in the shank 12 of the knob 10 is adapted to receive the detent 15, after first being depressed while the shank 12 is being applied and thenpermitted to spring outwardly by action of the leaf spring 16.

At the outer end of the spindle 14 is a split collar indicated generally by the reference character 18. The collar has an inner flange 19 adapted to fit over the outer end of the spindle 14 and to present an annular shoulder 20 in an outwardly facing direction. A short cylindrical protrusion 21 extends outwardly through a central'hole 22 in the face'portion 11 in the assembled condition shown in FIGURE 1. A space or chamber 23 inside'of the knob 10 surrounds the spindle section which is contained within the knob 10 when in assembled position.

As clearly shown, especially in FIGURES 4.and 5, the spindle 14 is a tubular spindle having a cylindrical bore 24 therethrough open at the outer end. vOn' one side of the spindle 14 is an axially extending slot 25 which is open at the outer end. On one side of the slot 25 is a cutout portion or recess 26 which has a length less than the length of the slot 25 and which forms an inwardly facing retaining shoulder 27.

A key-operated mechanism, indicated generally by the reference character 30, is shown mounted in position in FIGURE 1. Characteristic details are shown in FIG- URES 2 and 3. The key-operated mechanism comprises a cylinder casing 31, which is substantially cylindrical in shape, and which has attached along one side, in an axially extending direction, a pin tumbler housing 32. V

Rotatively mounted within the cylinder casing 31 is a substantially cylindrical cam member 33, the degree of rotation, however, being substantially limited by structure attached thereto, namely, a cam 34. The cam 34 extends for only a portion of the length of the cylindercasin'g 31 and pin tumbler housing 32 as clearly shown by the broken lines in FIGURE 1. As shown advantageously in FIG- URES 2 and 3, the cam 34 is arcuate in cross-section and is received in an arcuate recess 35 in the pin tumbler housing 32. The arcuate recess 35 has a closed end 36, the other end'being open. from the cam 34 is received in a pocket 38 slightly wider than the diameter of the pin 37. The fit of the pin 37 in the pocket 38 permits a limited arcuate movement of the cam member 33 and cam 34, determined by the clearance between the pin 37 and the pocket 38, as shownby a.com parison of FIGURE 2 with FIGURE 3.

As shown in FIGURES l and 2, a side edge 39 of the cam 34 projects into the recess 26 at the side of the slot 25 in the spindle 14. In this position, the pin 37 is at the outermost wall of the pocket 38. Withdrawn position is shown in FIGURE 3, where the pin 37 is at'the opposite side of the pocket 38, and the side edgel 39 of the cam 34 is substantially flush with the arcuate exterior of the pin tumbler housing 32. In this position, the cam and its side edge 39 are withdrawn entirely from the recess 26.

A pin 37 extending outwardly Rotatively mounted in the pin tumbler housing 32 is a key plug 42. 'The key plug 42 has a keyway 43 of conventional type extending centrally through the key a plug'42i Along theskey plug 42 and the keyway 43' is a series of pin tumbler holes like-the pin t umbler hole 44 shown in FIGURES 2 and 3, and in the cam 34-is a similar series of pin tumbler holes like the pin tumbler hole 45.; As shown, the pin'tumbler hole 45 is in axial t alignment with the pin tumbler hole 44.

Similarlyin the pin tumbler housing 32 is a series of pin tumbler holes like the pin tumbler hole 45.1 When 7 the pin tumbler holes 44, 45 and are in axial alignment as shown in FIGURE 2, they form a p'inturnbler bore for a series of pin tumblers identifiedlby the reference characters 47, 48 and 49.; The pin tumblers are int pressed inwardly by a spring'SO heldin position in the pin tumbler hole 46' by a cap 51; When the. device is inthe adjustment lock, is capable of being locked and unlocked by means key 55 is so cut that it is capable'of lifting pin tumbler's 47. so that theyrcoincide with the shear line existing beshown "in FI :URES 1 and 2, the key plug 42, and accordingly the door .of an operator key 55. It will benoted that the operator withdrawn. The key-operated mechanism thenlremains locked in place, as has been previously described.

'Having described the invention, what is claimedas new in support of Letters Patentis: 1 7

1. In a lock, a spindle having a bore therein and a re- 7 taining shoulder on the; spindle, a key-operatedsmechanism having aportion thereof located in said bore and,

a portion e'xtending'through the wall of ,saidspindle adjacent said shoulder, cam means operably associated with said key-operated mechanism and responsive to operation by a control key and not-responsive to operation by an operator key, saidcam means being extendable into enfgagernent with said shoulderv whereby to'retain said keytween the exterior of the key plug" 42 and the interior of a the cam 34. Hence, the key plug 42is. free to turn about its axis within the cam member 33 and correspondingly within the cylinder casing .31. In this adjustment, the

pin tumbler 49, howeveneittends downwardly across the shear line formed between the arcuate exteriorrof'the cam 34 and the corresponding arcuate interior wall of I the recess 35. Therefore the cam member remains in the position shown in FIGURE 2 relativeto the remaining portions of the device, which means that the side edge 39 remains in the recess. 26 and cannot be rotated to a position out ofthe recess by operation of the opera,- tor key 55. Therefore, the whole key-operated'mechanism 30 remains in proper positionwithin the spindle 14 and knob 10, but more particularly remains in position by reason of the fact that the cam134 engages against the inwardly facing retaining shoulder 27 at the outer,

end of the recess 26; Hence, the key-operated mechanism 30-is actually fastened to the -spindle;14 entirely;

independently of the knob 10. V a

When itgbecomes advisable to remove the entire keyoperated mechanism 30,: use :is made of a control key The control .key 56 is so cut that the pin tumbler 48 is moved outwardly 56, shown in operation in FIGURES.

against the pin tumbler 49 until the break between the pin tumbler 48 and pin tumbler 49 coincideswith the shear line formed between the arcuate exterior ofsthe cam 34 andthe arcuate interior of the recess 35. By the same key setting, the pin tumbler47 is moved upwardly so that it crosses the shear line formed between the exteriorof the key plug 42 and the interior of the cam member 33. Accordingly, the key plug 42 and cam member 33 are keyed together so that they rotate as a unit when the control key 56 is rotated, thereby per 2 to the position ofFIGURE 3. This rotation is limited,

as previously described, by the pin 31 in the pocket 38, but rotation is suflicientto withdraw the side edge- 39, of the cam 34 from its position of retention by the' shoul-s der 27. 7 L However, by forming the central hole 22in the face portion 11 of the knob 10 with a cross-section corresponding to the combined cross-sectional shape of the cylinder casing 31 and pin tumbler housing 32, the entire key-operated mechanism 30' can then be withdrawn outwardly with respect to the. spindle 14 and knob 10 without any need for removing the knob 10 from the spindle 14 and actually, therefore, without disassembling any other portion of the look When the key-operated mechanism 30 operated mechanism in, engagement with said spindle during manipulation of said key-operated mechanism by said operator key.

2.,In a lock, a mounting member, a spindle rotatably .mountedinsthe mounting'mernber, said spindle having v.a' bore therein, means forming'a slot in the wall of said spindle in communication with said'bore and a retaining a shoulder on thespindle adjacent said slot, a key-operated mechanism having asportion thereof located in said bore a and portion extending through .the slot adjacent said shoulder, camimeans operably associated with said key,-

operated mechanism and a set of tumblers-in said key.- operated mechanism responsive to operation by a control key and not responsive to; operation by, an operator key, said cammeans being-extendable into engagement.- :with said shoulder uwhereby to retain said key-operated mechanism in engagement with 'said spindle during manipulation of said key-operated mechanism by said operator key. a a i 3. In a lock, a mounting member, a tubular spindlehavingan open outervend and rotatably mounted in said mounting member, saidspindlejhaving an axially extending slot open at said outer end and a recess. at the side of said slot forrning an'inwardly facing retaining shoulder, a cylinder casing'having a pin tumbler housing on one side, said cylinder casing .beingrmountedsin. said spindle with the housing received insaid slot, a cam member havng a rotatable mounting in said casing and avkey plug rotatably mounted in said cammember, said cylinder casing having a clearancein alignment with lithe,

' "recess inthe spindle, and a cam 'on said cam member 5 mittingthe cam 34 to rotate from the position of FIGURE 7 in alignment with said clearance and eXtendable into said clearance and into .the recess whereby .to engage 'said fshoulder said carnmeans including a, set of tumblers movable by a control key to release position for said cam member and a set of tumblers movable by an opera-1 tor key to release position for said key. plug and blocking position for said cam member, whereby said cylinder casing remains anchored in position in said spindle when said key plug is manipulated to locking and unlocking positions. r 7

References Cited by the Examiner V a J V UNITEDIST ATES PATENTSI 1,575,092 "3/26 Best 70-373 2,814,941 12/57 Best 70340 3,019,632 2/62 Russell 70224 ALBERT H. KAMPE, Primary Examiner. 

1. IN A LOCK, A SPINDLE HAVING A BORE THEREIN AND A RETAINING SHOULDER ON THE SPINDLE, A KEY-OPERATED MECHANNISM HAVING A PORTION THEREOF LOCATED IN SAID BORE AND A PORTION EXTENDING THROUGH THE WALL OF SAID SPINDLE ADJACENT SAID SHOULDER, CAM MEANS OPERABLY ASSOCIATED WITH SAID KEY-OPERATED MECHANISM AND RESPONSIVE TO OPERATION BY A CONTROL KEY AND NOT RESPONSIVE TO OPERATION BY AN OPERATOR KEY, SAID CAM MEANS BEING EXTENDABLE INTO ENGAGEMENT WITH SAID SHOULDER WHEREBY TO RETAIN SAID KEYOPERATED MECHANISM IN ENGAGEMENT WITH SAID SPINDLE DURING MANIPULATING OF SAID KEY-OPERATED MECHAISM BY SAID OPERATOR KEY. 